Pokemon Go's most recent Legendary Pokemon, Ho-Oh, may no longer be available, but players didn't have to wait long for a new Legendary to replace it. Beginning December 15, players around the world will have a chance to encounter the Legendary Ground-type Groudon for a limited time.

Groudon marks the first Legendary Pokemon from Gen 3 to appear in Pokemon Go. Like previous Legendaries, it can be encountered as a Raid Battle at Gyms. You'll need to team up with other players in real-life to battle it; only after bringing Groudon down will you have a chance to capture it. Groudon will appear in the game until 1 PM PT / 4 PM ET / 9 PM GMT on January 15, 2018.

New Pokemon weren't the only additions last week's update brought to Pokemon Go. Developer Niantic also introduced a dynamic weather system. Now, the weather in the real-world will be reflected in-game, which affects how often you'll encounter certain Pokemon; Water-types, for instance, will spawn more frequently when it's raining. In addition to that, Niantic also added the ability to create Battle Parties. Players can save teams of up to six Pokemon to use in Raid and Gym battles.